JPH06348655A - Electronic computer - Google Patents

Abstract

PURPOSE:To attain the calculation of a constant even during an arithmetic operation including the parentheses or an arithmetic operation where a calculating order is previously set by carrying out the calculation of the constant based on the arithmetic contents and the numerical value stored in a storage means corresponding to a constant key when this key is operated in the modes other than a setting mode. CONSTITUTION:For instance, the working mode is switched to a setting mode by a setting means even during an operation and then a constant key 34 is operated. Thus the arithmetic contents and the numerical which are designated by an arithmetic key 32 and a numerical key 31 operated before the key 34 are stored in a RAM 4 corresponding to the key 34. Then the setting mode is changed to an arithmetic mode and the key 34 is operated again after execution of the calculation. Thus the arithmetic contents and the numerical are read out of the RAM 4 and a constant is calculated. Therefore the constant can be set even during an arithmetic operation including the parentheses or an arithmetic operation where a calculating sequence is previously set and the calculation is carried out based on the calculated constant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic computer having a constant arithmetic function.

[0002]

2. Description of the Related Art Some electronic calculators and the like have a constant calculation function, and the constant calculation function can be operated by pressing the calculation key such as ×, ÷, +,-twice with the numerical value displayed. When the operation is performed, the input numerical value and the operation content designated at that time are registered as constants, and when the = key is operated thereafter, the registered constant calculation is executed. For example,
If you enter the numerical value "20" and operate the X key twice, "X
20 "is registered as a constant. Next in this state, the value Y
When is input and the = key is operated, the constant operation of “Y × 20” is executed.

However, in the above-mentioned conventional constant arithmetic operation, if the arithmetic keys such as ×, ÷, +, and − are operated after the constant is registered, the registration is canceled. There was a problem that constant calculation could not be performed in the middle of a predetermined calculation.

An object of the present invention is to provide an electronic computer capable of constant calculation even in the middle of an operation including parentheses or an operation in which the order of operations is determined.

[0005]

The electronic computer according to the present invention comprises a calculation / numerical key, a constant key, a setting means for a constant setting mode, a calculation key and a numerical key, and a constant in the setting mode. Storage means for storing, when the key is operated, the operation contents and numerical values designated by the operation key and the numerical key in association with the operated constant key;
When the constant key is operated when not in the setting mode,
There is provided an operation executing means for executing a constant operation based on the operation content and the numerical value stored in the storage means in association with the constant key.

[0006]

In the present invention, for example, even during calculation, the setting mode is switched to the setting mode and the constant key is operated, whereby the calculation content and the numerical value specified by the calculation key and the numerical key operated before the constant key is operated. Are stored in the storage means in association with the constant keys. Then, after switching from the setting mode to the calculation mode, when the calculation is executed and the constant key is operated again, the calculation contents and numerical values stored in the storage means corresponding to the constant key are read out and the constant calculation is executed. To be done.

Therefore, it is possible to set a constant even in the middle of an operation including parentheses or an operation in which the order of operations is determined, and it becomes possible to perform constant calculation using the set constant.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the circuit configuration of an electronic desk-top computer with a constant calculation function according to the embodiment.

The oscillator circuit 1 generates a clock signal which serves as a reference for the operation of the controller 2. The key input unit 3 includes a numerical key 31, a function key 32 including arithmetic keys such as ×, ÷, −, and + and a shift key, and a left parenthesis key 33.
, A right parenthesis key 35, a constant key 34 composed of F _{1 to} F ₃ keys which is operated when setting a constant, a mode key M which is operated when the mode is switched, and an all clear key which clears the contents of the memory ( AC key), and operation signals of these keys are output to the control unit 2.

The RAM 4 associates the display register X for storing the numerical value and the operation result input from the key input unit 3, the operation registers Y and Z, the specified operation content and the numerical value with each constant key 34. Store constant registers f _{1 to} f
₃ , a register n for storing the number of parentheses, a mode register m for storing a numerical value corresponding to the operation mode, and a register 1 for storing the content of the operated function key 32.

[0011] The liquid crystal display unit 6, a numerical display unit 61 composed of a multi-digit segment display member for displaying a numerical value, is operated "SET", F ₃ key F ₁ keys displayed when the setting mode constants When the setting of “F
₁ "," F ₂ "," F ₃ ", left parenthesis key 33 is displayed when the right parenthesis key 35 or operation key is operated" (, ×, ÷, +, - each character-designation of " And a body 62.

The control unit 2 has a built-in ROM and its R
Key input processing, arithmetic processing, etc. are executed according to the control program stored in the OM, and numerical values and arithmetic results input from the key input unit 3 are stored in the RAM 4, and
The display driver 5 is driven to display the data on the liquid crystal display unit 6.

Next, the operation of the embodiment having the above configuration will be described with reference to the flowcharts of FIGS. 2 and 3 and the drawings showing an example of the operation procedure of FIGS. 4 to 9. FIG. 2 is a flowchart showing the processing contents when the mode key is operated. First, in step S1, it is determined whether or not the value of the mode register m is "0", that is, the mode key is operated in the calculation mode of m = 0.

If the value of the mode register m is "0" in the determination in step S1, it means that the mode key M is operated in the arithmetic mode. In that case, the process proceeds to step S2 and "1" is stored in the mode register m. To switch to the constant setting (setting) mode. As a result, the calculation mode (m = 0) is switched to the set mode (m = 1). Therefore, in the next step S3, the characters “SET” on the display unit 6
The symbol display body 62 is lit and displayed to clearly indicate that the mode has been switched to the set mode.

On the other hand, if the value of the mode register m is not "0" in the determination of step S1, it means that the mode key M is operated in the set mode of m = 1. In that case, the process proceeds to step S4. "0" in the mode register m
Set to switch to calculation mode, and the characters "SET"
The symbol display body 62 is put in the erased state.

After step S3 or step S4, it is determined in step S5 whether or not a constant is set in the constant register f ₁ . When the constant is set in the constant register f ₁ , the character / symbol display 62 of “F ₁ ” on the liquid crystal display unit 6 is lit in the next step S6 and the constant is set in the F ₁ key. Explicitly.

Similarly, in step S7, the constant register f ₂
If a constant is set in the constant register f ₂ , it is determined whether or not a constant is set in
At 8, the character / symbol display 62 of “F ₂ ” on the liquid crystal display unit 6 is lit and displayed to clearly show that the constant is set to the F ₂ key.

Further, in step S9, the constant register f ₃
It is determined whether or not a constant is set in. When the constant is set, thereby lighting display characters and symbols display body 62 of the "F _3" of the liquid crystal display unit 6 at the next step S10. Then, in step S11, lighting control of each segment of the numerical value display section 61 of the liquid crystal display section 6 is performed to display the numerical value stored in the register X.

Next, the processing contents when the F ₁ key of the constant keys 34 is operated will be described with reference to the flowchart of FIG. First, in step S21, the mode register m
The value of is "1", that is, it is determined whether or not the F ₁ key is operated in the set mode. When m = 1 in this determination, the process proceeds to step S22 and it is determined whether or not the F ₁ key is operated after the shift key is operated.

If it is determined in step S22 that the F ₁ key has not been operated subsequent to the shift key, step S23
Then, it is determined whether or not the calculation content is stored in the register l and the numerical value is stored in the register X.

If the data is stored in the register l and the register X, the process proceeds to step S24 and the register l is registered.
The arithmetic contents stored in the register and the numerical value stored in the register X are transferred to the constant register f ₁ . That is, m
When you operate the F ₁ key in = 1 of the set mode, F
_The numerical value and the operation contents input before operating the ₁ key are transferred to the register f ₁ and set as a constant corresponding to the F ₁ key. As a result, the constant has been set for the F ₁ key, and in the next step S25, the character / symbol display 62 of “F ₁ ” on the liquid crystal display unit 6 is lit and displayed.

FIG. 4 is a diagram showing an example of an operation procedure for setting a constant to the F ₁ key. Numerical key 31 "5"
When the and key of the multiplication key are operated in order, the input numerical value "5" is displayed on the numerical display part 61 of the liquid crystal display part 6, and the character / symbol display 62 of "x" indicating multiplication is lit and displayed. (Fig. 4, (1)).

Next, when the left parenthesis key 33, the numerical key 31 "1" and "2" and the addition key + key are operated in order, "(" indicating the parentheses on the liquid crystal display 6 and addition are indicated. The “+” character / symbol display 62 is lit and displayed, and the input numerical value “12” is displayed on the numerical display unit 61 ((2) in the figure).

Next, when the left parenthesis key 33, the numerical key 31 "4" and "5" and the addition key + key are operated in order, "(" indicating the parentheses on the liquid crystal display 6 and addition are indicated. The "+" character / display 62 is lit and displayed,
The input numerical value "45" is displayed on the numerical display portion 61 ((3) in the same figure).

Next, by operating the numeral key 31 "5" and the right parenthesis key 35 in order, the operation in the parenthesis is executed when the right parenthesis key 35 is operated, and the parentheses "" of the liquid crystal display section 6 are shown. The character / symbol display 62 of () is lit and displayed, and the numerical result display section 61 shows the calculation result in parentheses “5”.
"0" is displayed ((4) in the figure).

When setting the calculation for adding the value "50" in parentheses and its value as a constant, first, the mode key M is operated to switch from the calculation mode to the set mode. Then, the characters "SET" on the liquid crystal display 6
Since the symbol display body 62 is lit and displayed, in that state, F
_{When the 1} key is operated, the numerical value “50” displayed on the numerical display portion 61 at that time and addition as the content of the calculation are set in the constant register f ₁ . Then, "F
" ₁ " and the "+" character / symbol display 62 indicating addition are lit and displayed (FIG. 4, (5)).

After that, when the mode key M is operated again, the set mode is switched to the calculation mode, and the liquid crystal display unit 6
The "SET" and "+" character / symbol display bodies 62 of (4) are erased (FIG. 4, (6)).

Returning to FIG. 3, the shift is determined by the determination in step S22.
F after pressing the key₁If the key is operated, the
Go to step S26, constant register f₁To clear. Furthermore
Then, in the next step S27, "F₁Sentence
The character / symbol display 62 is put in the erased state. That is, m =
After operating the shift key in the 1 set mode, press F ₁
By operating the key, F₁Is set for the key
You can clear the constant.

Further, the mode register m in step S21
If m ≠ 1 when it is determined whether the value of "1" is "1", it means that the F ₁ key is operated in the calculation mode. Therefore, the process proceeds to step S28, and after the operation of the all clear key (AC key), F Determine whether or not the ₁ key was operated. A
When the F ₁ key is operated after the C key is operated, the operation contents and numerical values registered in the constant register f ₁ are displayed on the liquid crystal display unit 6 in step S29. That is, m =
At 0 operation mode, by operating the F ₁ key after operating the AC key, you can check the constants that are set for the F ₁ key.

If it is determined in step S28 that the F ₁ key has not been operated after the AC key has been operated, step S30
Then, the constant calculation is performed on the basis of the numerical value and the operation contents registered in the constant register f ₁ .

The same processing as that of the F ₁ key described above is executed for the F ₂ and F ₃ keys, and the input numerical values and calculation contents are constant registers f ₂ and f ₃ as constants corresponding to the respective keys. Is set to.

Next, an operation procedure for setting constants, confirming constants, calculating constants and deleting constants will be described with reference to FIGS. FIG. 5 shows an operation procedure for setting “× 2” and “−3” as the constants F ₁ and F ₂ in order to execute the calculation of y = 2x−3. When setting a constant, the mode key M is first operated to switch to the set mode of m = 1. Next, after operating the "x" key and "2" of the numerical key 31, the F ₁ key of the constant keys 34 is operated. Then, the constant register f ₁ corresponding to the F ₁ key
“× 2” is set as a constant.

Next, the "-" key and the numerical key 31 "3"
When the F ₂ key is operated after operating, the constant “-3” is set in the constant register f ₂ corresponding to the F ₂ key. Next, FIG. 6 shows an operation procedure when confirming the constant set as described above. F ₁ after operating the AC key in the calculation mode (COMP mode) of m = 0
When the key is operated, the constant set in the constant register f ₁ at that time, “× 2” in this case, is displayed on the liquid crystal display unit 6. When the F ₂ key is operated after the AC key, the constant set in the constant register f ₂ at that time,
In this case, "-3" is displayed.

[0034] Figure 7, in the constant register f _1, f ₂ by setting operation described above, each "× 2", "- 3" is a diagram showing the operating procedure of the constants calculated when set.
In the calculation mode, operating the numeric key 31 "1" and the F ₁ key causes "x" set in the constant register f ₁ to be changed.
“2” is read out, the constant calculation of “1 × 2” is performed, and the calculation result “2” is displayed on the liquid crystal display unit 6. When operating the F ₂ key in this state, is read out "-3" set in the constant register f ₂ is carried out constant calculation of "2-3", the liquid crystal display unit 6 calculated result of "- 1 ”is displayed.

Similarly, when the “2” and F ₁ keys of the numerical key 31 are operated, “× 2” is read from the constant register f ₁ and the constant of “2 × 2” is calculated. 4 "
Is displayed on the liquid crystal display unit 6. When the F ₂ key is operated in that state, “-3” of the constant register f ₂ is read out, the constant calculation of “4-3” is performed, and the calculation result “1” is displayed on the liquid crystal display unit 6. It

In this embodiment, the mode key M is operated to switch to the set mode even during the calculation, and then the constant key 34 is operated so that the numerical value and the calculation content are made to correspond to the constant key 34 and the constant is changed. It can be stored in the register f _i . As a result, the constant calculation can be executed at any time during the operation in the parentheses or the operation with priority.

FIG. 8 is a diagram showing another example of the operation procedure for constant calculation. Numeric key 31 "1" in calculation mode
And F ₂ key, the constant register f ₂ reads “-
"3" is read out, the constant calculation of "1-3" is performed, the calculation result "-2" is displayed on the liquid crystal display unit 6, and when the F ₂ key is operated again in that state, "2" is similarly obtained. -2-3 "
The constant calculation is performed, and the calculation result “−5” is displayed on the liquid crystal display unit 6.

Next, FIG. 9 is a diagram showing an operation procedure for canceling the constant set in each constant key 34.
In the set mode, and operates the F ₁ key after operating the shift key, the data of the constant register f ₁ is cleared, further characters and symbols display body 62 of the "F _1" of the liquid crystal display unit 6 is an erased state. Moreover, by operating the F ₂ key after operating the shift key, the data of the constant register f ₂ is cleared, characters and symbols display body 62 of the "F _2" of the liquid crystal display unit 6 is an erased state.

The constant calculation function of the present invention can be applied not only to the four arithmetic operations but also to the operations such as X ^Y , X ^{1 / Y,} etc., or the conversion from polar coordinates to rectangular coordinates or from rectangular coordinates to polar coordinates. Further, the electronic desk calculator of the embodiment is not the only example, and electronic devices such as an electronic notebook and a personal computer having a calculation function may be used.

[0040]

According to the present invention, constant calculation can be performed even in the middle of an operation including parentheses, an operation whose operation order is determined, and the like.

[Brief description of drawings]

FIG. 1 is a circuit block diagram of an electronic desk calculator according to an embodiment.

FIG. 2 is a flowchart of mode key processing.

FIG. 3 is a flowchart of F ₁ key processing.

FIG. 4 is a diagram showing an operation procedure when setting a constant.

FIG. 5 is a diagram showing an operation procedure when setting a constant.

FIG. 6 is a diagram showing an operation procedure when confirming a constant.

FIG. 7 is a diagram showing an operation procedure for constant calculation.

FIG. 8 is a diagram showing an operation procedure of constant calculation.

FIG. 9 is a diagram showing an operation procedure when deleting a constant.

[Explanation of symbols]

 2 Control part 3 Key input part 4 RAM 31 Numerical key 32 Function key 34 Constant key

Claims (1)

[Claims] 1. An electronic computer having an arithmetic function, including arithmetic and numerical keys, constant keys, setting means for setting a constant setting mode, and the arithmetic keys and numerical keys being operated and set. When the constant key is operated in the mode, storage means for storing the contents of calculation and numerical values designated by the calculation key and the numeric key in correspondence with the operated constant key, and the constant key is operated when not in the setting mode. When
An electronic calculator comprising: an arithmetic execution means for executing a constant arithmetic operation based on the arithmetic contents and numerical values stored in the storage means in association with the constant key.